阅读说明：本技术 核废物包装体双模同步扫描检测装置和检测方法 (Nuclear waste packaging body dual-mode synchronous scanning detection device and detection method ) 是由 石睿 庹先国 刘明哲 杨剑波 成毅 王磊 康玉宽 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种核废物包装体双模同步扫描检测装置,包括转动平台,转动平台连接有转动驱动机构；转动平台的周围设置有第一升降平台、第二升降平台以及第三升降平台,第一升降平台上设置有平移平台,平移平台连接有平移驱动机构,且平移平台上设置有单HPGe探测器系统；第二升降平台上设置有透射源和准直器组件；第三升降平台上设置有矩阵探测器系统；矩阵探测器系统的矩阵探测器、透射源和准直器组件以及单HPGe探测器系统的单HPGe探测器均朝向转动平台。本发明与现有的单HPGe探测器相比,工作效率显著提高,与现有的阵列式的HPGe探测器相比,造价低,在兼顾经济性和普适性的同时,可显著提升TGS的扫描效率,缩短测量时间,提高层析γ扫描速度。(The invention discloses a dual-mode synchronous scanning detection device for a nuclear waste packaging body, which comprises a rotating platform, wherein the rotating platform is connected with a rotating driving mechanism; a first lifting platform, a second lifting platform and a third lifting platform are arranged around the rotating platform, a translation platform is arranged on the first lifting platform, the translation platform is connected with a translation driving mechanism, and a single HPGe detector system is arranged on the translation platform; a transmission source and a collimator assembly are arranged on the second lifting platform; a matrix detector system is arranged on the third lifting platform; the matrix detector, the transmission source and collimator assembly of the matrix detector system and the single HPGe detector of the single HPGe detector system are all oriented toward the rotating platform. Compared with the existing single HPGe detector, the invention has the advantages of obviously improving the working efficiency, having low manufacturing cost compared with the existing array type HPGe detector, obviously improving the scanning efficiency of TGS, shortening the measuring time and improving the chromatography gamma scanning speed while giving consideration to the economy and the universality.)

1. Nuclear waste packing body bimodulus synchronous scanning detection device, its characterized in that: the device comprises a rotating platform (1), wherein the rotating platform (1) is connected with a rotating driving mechanism; a first lifting platform (2), a second lifting platform (3) and a third lifting platform (4) are arranged around the rotating platform (1), a translation platform (21) is arranged on the first lifting platform (2), the translation platform (21) is connected with a translation driving mechanism, and a single HPGe detector system (22) is arranged on the translation platform (21); a transmission source and a collimator assembly (31) are arranged on the second lifting platform (3); a matrix detector system (41) is arranged on the third lifting platform (4); the matrix detector system (41), the transmission source and collimator assembly (31) and the single HPGe detector system (22) are all oriented towards the rotating platform (1).

2. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: the device is characterized by further comprising a first support frame (23), wherein a vertical first transmission screw rod (24) is arranged on the first support frame (23), and the first transmission screw rod (24) is connected with a first motor (25) for driving the first transmission screw rod (24) to rotate; the first lifting platform (2) is in sliding fit with the first support frame (23) in the vertical direction, and the first transmission screw rod (24) is in threaded fit with the first lifting platform (2).

3. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 2, characterized in that: be provided with vertical first guide post (26) on first support frame (23), the both sides face of first guide post (26) is inside sunken to form the spout, the both ends of first lift platform (2) are provided with first sliding sleeve (27), the inner wall of first sliding sleeve (27) is provided with the lug, the lug of first sliding sleeve (27) be located the spout of first guide post (26) and with spout sliding fit.

4. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: the horizontal second transmission screw rod (28) is arranged above the first lifting platform (2), the second transmission screw rod (28) is connected with a second motor (29), the translation platform (21) is in sliding fit with the first lifting platform (2), and the translation platform (21) is in threaded connection with the second transmission screw rod (28).

5. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: the device is characterized by further comprising a second supporting frame (32), wherein a vertical third transmission screw rod (33) is arranged on the second supporting frame (32), and the third transmission screw rod (33) is connected with a third motor for driving the third transmission screw rod (33) to rotate; the second lifting platform (3) is in sliding fit with the second support frame (32) in the vertical direction, and the third transmission screw rod (33) is in threaded fit with the second lifting platform (3).

6. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: still include third support frame (44), be provided with vertical fourth transmission lead screw (45) on third support frame (44), fourth transmission lead screw (45) are connected with and drive fourth transmission lead screw (45) pivoted fourth motor, third lift platform (4) and third support frame (44) sliding fit in vertical direction, and fourth transmission lead screw (45) and third lift platform (4) screw-thread fit.

7. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: and a horizontal first guide rail (35) is arranged on the upper surface of the second lifting platform (3), and the bottom of the transmission source and collimator assembly (31) is in sliding fit with the first guide rail (35).

8. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: third lift platform (4) include multilayer horizontally mounting panel (42), and every layer of mounting panel (42) upper surface is provided with second guide rail (43), matrix detector system (41) include a plurality of scintillator detectors, the bottom and the second guide rail (43) sliding fit of every scintillator detector to in the distance between the two adjacent scintillator detectors of regulation.

9. The dual-mode synchronous scanning detection device for the nuclear waste packaging body according to claim 1, characterized in that: still include base (5), rotating platform (1), first lift platform (2), second lift platform (3) and third lift platform (4) are all installed on base (5).

10. The detection method of the nuclear waste packaging body dual-mode synchronous scanning detection device of any one of claims 1 to 9 is characterized by comprising the following steps:

A. the nuclear waste packaging body (100) is packaged in an integral mode, the layering number of a sample to be detected is determined, and each layer corresponds to a detection height;

B. adjusting the heights of the first lifting platform (2), the second lifting platform (3) and the third lifting platform (4) to enable the single HPGe detector system (22), the transmission source and collimator assembly (31) and the matrix detector system (41) to face to a first detection height position of a sample to be detected, and then adjusting the horizontal position of the translation platform (21) to enable the single HPGe detector system (22) to be in a first horizontal detection position and enable the transmission source to be aligned to the center of the single HPGe detector;

C. starting the single HPGe detector system (22), the transmission source and collimator assembly (31) and the matrix detector system (41), and simultaneously starting to measure a gamma energy spectrum by the single HPGe detector system (22) and the matrix detector system (41) so as to complete transmission measurement and emission measurement of a first horizontal detection position at a first detection angle;

D. moving the single HPGe detector system (22) to each horizontal detection position, and detecting again until the transmission measurement and the emission measurement at all the horizontal detection positions at the first detection angle are completed;

E. the rotating platform (1) rotates a set angle and enters the next detection angle position;

F. measuring transmission and emission measurements at all horizontal sensing positions at the next sensing angle position according to the method described in steps C, D and E; completing transmission measurement and emission measurement at all detection angle positions until the nuclear waste packaging body (100) rotates for a circle, and completing scanning of the first layer of sample;

G. synchronously lifting the first lifting platform (2), the second lifting platform (3) and the third lifting platform (4) to scan a second layer of samples, enabling the single HPGe detector system (22), the transmission source and collimator assembly (31) and the matrix detector system (41) to face the next detection height position of the samples to be detected, and completing scanning of the second layer of samples according to the methods recorded in the steps C to F;

H. step G is repeated until the gamma spectroscopy measurements at all probed height positions of the core waste package (100) are completed.

Technical Field

The invention belongs to the technical field of measurement and analysis of radioactivity of nuclear waste packaging bodies, and particularly relates to a dual-mode synchronous scanning detection device and a detection method for a nuclear waste packaging body.

Background

With the continuous development and prosperity of the nuclear industry system, the problem of nuclear waste accumulation is more and more prominent. An important international problem in the field of nuclear safety assurance and nuclear waste detection is: how to accurately obtain key technical parameters such as nuclide species, nuclide content and the like of special nuclear materials in nuclear waste. In view of the characteristics of the special nuclear materials such as specificity and difficulty in detection, how to realize accurate qualitative and quantitative nondestructive detection and analysis of the special nuclear materials in the nuclear waste becomes one of the key scientific problems and technical difficulties of nuclear safety guarantee. Segmented Gamma Scanning (SGS) and tomogrAN _ SNhy Gamma Scanning (TGS) are two major supporting technologies for nondestructive testing and analysis of nuclear waste, beginning in the 70-90 s of the last century. Compared with the SGS technology, the TGS technology is more advanced and accurate, not only can qualitatively and quantitatively calculate the radioactivity of the nuclear waste, but also can obtain a radioactivity distribution image, has richer reflected information and wider application prospect, and is one of the main research directions aiming at the nondestructive detection of the nuclear waste at present. Although the TGS technology uses medical CT and ECT principles for reference, the gamma scan analysis of the nuclear waste package has its own difficulties due to the characteristics of large volume of the nuclear waste package, uneven distribution of media and nuclides, lack of prior information, etc., wherein the low scan efficiency is one of the important reasons that the TGS technology is limited in application at present.

At present, a single HPGe detector is mainly adopted in a TGS equipment detection system, step-by-step transmission measurement and emission measurement are adopted in scanning modes, the detection time is long, and the efficiency is low. The detection by the array type multi-detector can obviously improve the efficiency, but the array type HPGe detector is expensive and is inconvenient to assemble on site due to the need of refrigeration equipment.

Disclosure of Invention

The invention aims to provide a nuclear waste packaging body dual-mode synchronous scanning detection device and a detection method, based on a dual-mode synchronous scanning detection mode of matrix scintillator detector emission measurement and single HPGe detector transmission measurement, and the device and the method can remarkably improve the scanning efficiency of TGS, shorten the measurement time and improve the chromatography gamma scanning speed while giving consideration to economy and universality.

The purpose of the invention is realized as follows: the nuclear waste packaging body dual-mode synchronous scanning detection device comprises a rotating platform, wherein the rotating platform is connected with a rotating driving mechanism; a first lifting platform, a second lifting platform and a third lifting platform are arranged around the rotating platform, a translation platform is arranged on the first lifting platform, the translation platform is connected with a translation driving mechanism, and a single HPGe detector system is arranged on the translation platform; a transmission source and a collimator assembly are arranged on the second lifting platform; a matrix detector system is arranged on the third lifting platform; the matrix detector, the transmission source and collimator assembly of the matrix detector system and the single HPGe detector of the single HPGe detector system all face the rotating platform.

The device further comprises a first support frame, wherein a vertical first transmission screw rod is arranged on the first support frame, and the first transmission screw rod is connected with a first motor for driving the first transmission screw rod to rotate; the first lifting platform is in sliding fit with the first support frame in the vertical direction, and the first transmission screw rod is in threaded fit with the first lifting platform.

Furthermore, a vertical first guide post is arranged on the first support frame, two side faces of the first guide post are inwards recessed to form a sliding groove, first sliding sleeves are arranged at two ends of the first lifting platform, a protruding block is arranged on the inner wall of each first sliding sleeve, and the protruding block of each first sliding sleeve is located in the sliding groove of the first guide post and is in sliding fit with the sliding groove.

Furthermore, a horizontal second transmission screw rod is arranged above the first lifting platform, the second transmission screw rod is connected with a second motor, the translation platform is in sliding fit with the first lifting platform, and the translation platform is in threaded connection with the second transmission screw rod.

The device further comprises a second support frame, wherein a vertical third transmission screw rod is arranged on the second support frame, and the third transmission screw rod is connected with a third motor for driving the third transmission screw rod to rotate; and the second lifting platform and the second support frame are in sliding fit in the vertical direction, and the third transmission screw rod is in threaded fit with the second lifting platform.

Further, still include the third support frame, be provided with vertical fourth transmission lead screw on the third support frame, fourth transmission lead screw is connected with and drives fourth transmission lead screw pivoted fourth motor, third lift platform and third support frame are sliding fit in the vertical direction, and fourth transmission lead screw and third lift platform screw-thread fit.

Furthermore, a horizontal first guide rail is arranged on the upper surface of the second lifting platform, and the bottom of the transmission source and the collimator assembly is in sliding fit with the first guide rail.

Further, including the horizontally mounting panel of multilayer on the third lift platform, every layer of mounting panel upper surface is provided with the second guide rail, matrix detector system includes a plurality of scintillator detectors, the bottom and the second guide rail sliding fit of every scintillator detector to in adjust the distance between the two adjacent scintillator detectors.

Further, still include the base, rotation platform, first lift platform, second lift platform and third lift platform are all installed on the base.

The detection method adopting the dual-mode synchronous scanning detection device for the nuclear waste packaging body comprises the following steps:

A. the nuclear waste packaging body is packaged in an integral mode, the layering number of the sample to be detected is determined, and each layer corresponds to a detection height;

B. adjusting the heights of the first lifting platform, the second lifting platform and the third lifting platform to enable the single HPGe detector system, the transmission source and collimator assembly and the matrix detector system to face the first detection height position of the sample to be detected, and then adjusting the horizontal position of the translation platform to enable the single HPGe detector system to be in the first horizontal detection position, wherein the transmission source is aligned to the center of the single HPGe detector;

C. starting the HPGe detector system, the transmission source, the collimator assembly and the matrix detector system, and simultaneously starting to measure a gamma energy spectrum by the HPGe detector system and the matrix detector system to finish transmission measurement and emission measurement of a first horizontal detection position at a first detection angle;

D. moving the HPGe detector system to each horizontal detection position, and detecting again until the transmission measurement and the emission measurement at all the horizontal detection positions at the first detection angle are completed;

E. rotating the rotating platform by a set angle to enter the next detection angle position;

F. measuring transmission and emission measurements at all horizontal sensing positions at the next sensing angle position according to the method described in steps C, D and E; completing transmission measurement and emission measurement at all detection angle positions until the nuclear waste packaging body rotates for a circle, and completing scanning of the first layer of sample;

G. synchronously lifting the first lifting platform, the second lifting platform and the third lifting platform, entering the scanning of the second layer of samples, enabling the single HPGe detector system, the transmission source and collimator assembly and the matrix detector system to face the next detection height position of the sample to be detected, and completing the scanning of the second layer of samples according to the method recorded in the steps C to F;

H. and G is repeated until the gamma spectrum measurement at all detection height positions of the nuclear waste package is completed.

The invention has the beneficial effects that: the single HPGe detector system and the matrix detector system are integrated together, the single HPGe detector and the matrix detector system work synchronously, the working efficiency is obviously improved compared with the existing single HPGe detector, the manufacturing cost is low compared with the existing array type HPGe detector, the scanning efficiency of TGS can be obviously improved, the measuring time is shortened, and the chromatography gamma scanning speed is improved while the economy and the universality are considered.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic, diagrammatic view of a first lift platform;

FIG. 3 is a schematic view of the engagement of the first guidepost with the first runner;

FIG. 4 is a schematic view of a translation stage;

FIG. 5 is a schematic view of a third lift platform;

FIG. 6 is a schematic view of the mounting of the transmission source and collimator assembly;

FIG. 7 is a schematic view of a rotating platform;

FIG. 8 is a schematic view of a scintillator detector.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1, the dual-mode synchronous scanning detection device for the nuclear waste packaging body comprises a rotating platform 1, wherein the rotating platform 1 is connected with a rotating driving mechanism; a first lifting platform 2, a second lifting platform 3 and a third lifting platform 4 are arranged around the rotating platform 1, a translation platform 21 is arranged on the first lifting platform 2, the translation platform 21 is connected with a translation driving mechanism, and a single HPGe detector system 22 is arranged on the translation platform 21; a transmission source and collimator assembly 31 is arranged on the second lifting platform 3; a matrix detector system 41 is arranged on the third lifting platform 4; the matrix detector system 41, the transmission source and collimator assembly 31 and the single HPGe detector system 22 are all directed towards the rotating platform 1.

The upper surface of the rotating platform 1 is horizontal and used for fixing the nuclear waste packaging body 100, the rotating platform 1 can rotate around a central line, specifically, a servo motor with a speed reducer can be adopted as a rotation driving mechanism to drive the rotating platform 1 to rotate a specific angle at each time, and therefore the nuclear waste packaging body 100 can be detected under multiple angles. The nuclear waste packaging body 100 is generally packaged into a cylindrical shape or a rectangular parallelepiped shape, and in order to fix the nuclear waste packaging body 100, as shown in fig. 7, four positioning clamping blocks are arranged on the rotating platform 1, and elements such as an air cylinder, a hydraulic cylinder or an electric cylinder can be used as power to drive the four positioning clamping blocks to move linearly, so that the four positioning clamping blocks clamp the side surface of the nuclear waste packaging body 100, and clamping and loosening of the nuclear waste packaging body 100 are realized.

The first lifting platform 2 and the second lifting platform 3 are respectively positioned at the left side and the right side of the rotating platform 1, and during detection, the single HPGe detector system 22 and the transmission source and collimator assembly 31 are positioned at the two sides of the nuclear waste packaging body 100, so that the single HPGe detector system 22 can accurately receive gamma rays emitted by the transmission source. The first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 can all be lifted so as to adjust the heights of the single HPGe detector system 22, the transmission source and collimator assembly 31 and the matrix detector system 41, and to realize the detection of the nuclear waste package 100 at multiple heights. In addition, the single HPGe detector system 22 is mounted on a translation platform 21 capable of moving horizontally, and the horizontal position of the single HPGe detector system 22 can be changed, so that the nuclear waste packaging body 100 can be detected at a plurality of horizontal detection positions.

The single HPGe detector system 22 and the matrix detector system 41 are integrated together, the single HPGe detector system 22 and the matrix detector system 41 can work synchronously, compared with the existing single HPGe detector, the working efficiency is obviously improved, compared with the existing array type HPGe detector, the manufacturing cost is low, the economical efficiency and the universality are considered, meanwhile, the scanning efficiency of TGS can be obviously improved, the measuring time is shortened, and the chromatography gamma scanning speed is improved.

The first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 can be lifted and lowered by various conventional power mechanisms such as an air cylinder and a hydraulic cylinder as power, and the preferred embodiment is as follows: as shown in fig. 2, the device further comprises a first support frame 23, wherein a vertical first transmission screw 24 is arranged on the first support frame 23, and the first transmission screw 24 is connected with a first motor 25 for driving the first transmission screw 24 to rotate; the first lifting platform 2 is in sliding fit with the first support frame 23 in the vertical direction, and the first transmission screw rod 24 is in threaded fit with the first lifting platform 2. The first support frame 23 may be a support frame body in various forms, such as a gate-shaped support frame, an H-shaped support frame, a field-shaped support frame, etc., as long as stable support can be ensured. Two ends of the first transmission screw rod 24 can be mounted on the first support frame 23 through bearings, the first motor 25 is a servo motor, and can be connected with the first transmission screw rod 24 through various common connection modes such as a coupler, a speed reducer, a belt and a gear to drive the first transmission screw rod 24 to rotate. First lift platform 2 and first support frame 23 are at vertical orientation sliding fit, and this cooperation is fixed a position first lift platform 2, guarantees that first lift platform 2 only can reciprocate, and when first motor 25 drove first transmission lead screw 24 and rotates, under the effect of screw thread, first lift platform 2 can reciprocate, realizes the regulation of first lift platform 2 height. The servo motor is used as lifting power, the lifting height of the first lifting platform 2 can be conveniently and accurately controlled by using the existing control equipment, and the detection accuracy is ensured. In addition, the first motor 25 is matched with the speed reducer, so that the first lifting platform 2 can be ensured to move slowly and stably.

The first lifting platform 2 and the first support frame 23 are matched in various forms, for example, a vertical guide post is arranged on the first support frame 23, a sliding sleeve is sleeved outside the guide post and fixedly connected with the first lifting platform 2, or a dovetail groove is arranged on the first support frame 23, a dovetail-shaped sliding block is arranged on the first lifting platform 2, and the sliding block is positioned in the sliding groove and is in sliding fit with the sliding groove. Preferably, as shown in fig. 3, a vertical first guide column 26 is arranged on the first support frame 23, two side surfaces of the first guide column 26 are recessed inwards to form a sliding groove, first sliding sleeves 27 are arranged at two ends of the first lifting platform 2, a protruding block is arranged on an inner wall of each first sliding sleeve 27, and the protruding block of each first sliding sleeve 27 is located in the sliding groove of the first guide column 26 and is in sliding fit with the sliding groove.

Similarly, the second lifting platform 3 and the third lifting platform 4 may also adopt similar structures, and specifically, the lifting platform further comprises a second support frame 32, a vertical third transmission screw 33 is arranged on the second support frame 32, and the third transmission screw 33 is connected with a third motor for driving the third transmission screw 33 to rotate; the second lifting platform 3 is in sliding fit with the second support frame 32 in the vertical direction, and the third transmission screw 33 is in threaded fit with the second lifting platform 3. Still include third support frame 44, be provided with vertical fourth transmission lead screw 45 on the third support frame 44, fourth transmission lead screw 45 is connected with and drives fourth transmission lead screw 45 pivoted fourth motor, third lift platform 4 and third support frame 44 are sliding fit in vertical direction, and fourth transmission lead screw 45 and 4 screw-thread fit of third lift platform. The second support frame 32 and the third support frame 44 adopt various frame body structures capable of being stably supported. Two ends of the third transmission screw 33 are mounted on the second support frame 32 through bearings and connected with the third motor through transmission mechanisms such as a coupler, two ends of the fourth transmission screw 45 are mounted on the third support frame 44 through bearings and connected with the fourth motor through transmission mechanisms such as a coupler, and the third motor and the fourth motor are also servo motors and are respectively used for driving the second lifting platform 3 and the third lifting platform 4 to lift.

Further, ball screws may be used as the third transmission screw 33, the fourth transmission screw 45, and the first transmission screw 24.

The translation driving mechanism may be an existing driving device such as a hydraulic cylinder, an air cylinder, and preferably, as shown in fig. 4, the translation driving mechanism includes a second transmission screw 28 disposed above the first lifting platform 2, the second transmission screw 28 is disposed horizontally, the second transmission screw 28 is connected to a second motor 29, the translation platform 21 is in sliding fit with the first lifting platform 2, and the translation platform 21 is in threaded connection with the second transmission screw 28. The second motor 29 is connected to the second driving screw 28 through a coupling or the like, and is configured to drive the second driving screw 28 to rotate, so as to drive the translation platform 21 to move horizontally.

The sliding fit between the translation platform 21 and the first lifting platform 2, the sliding fit between the third lifting platform 4 and the third support frame 44 in the vertical direction, and the sliding fit between the second lifting platform 3 and the second support frame 32 in the vertical direction may be similar to the sliding fit between the first lifting platform 2 and the first support frame 23 shown in fig. 3, or may be various existing sliding fits.

As shown in fig. 6, a horizontal first guide rail 35 is disposed on the upper surface of the second lifting platform 3, the bottom of the transmission source and collimator assembly 31 is slidably engaged with the first guide rail 35, and the transmission source and collimator assembly 31 can slide along the first guide rail 35, so as to adjust the horizontal position of the transmission source and collimator assembly 31. The position of the transmission source and the collimator assembly 31 can be adjusted by using a ball screw mechanism driven by an air cylinder, a hydraulic cylinder or a motor as power, or manually, and the positions of the transmission source and the collimator assembly 31 are fixed by fastening screws and the like.

As shown in fig. 5, the third lifting platform 4 includes multiple layers of horizontal mounting plates 42, a second guide rail 43 is disposed on the upper surface of each layer of mounting plate 42, the matrix detector system 41 includes multiple scintillator detectors, as shown in fig. 8, each scintillator detector includes a detector body 411 and a collimator, the detector body 411 is an existing device, and the detector body 411 is located inside the collimator. The bottom of each scintillator detector is slidably fitted to the second guide rail 43 so as to adjust the distance between two adjacent scintillator detectors. The mounting plate 42 is typically two-layered, with a plurality of scintillator detectors disposed on each layer of mounting plate 42. Each of the scintillator detectors is slidable along the second guide rail 43, thereby adjusting the distance between two adjacent scintillator detectors. The movement of the scintillator detector can be manually adjusted by a person, and can also be automatically adjusted by adopting power equipment such as a motor or an air cylinder.

The horizontal position of the scintillator detector and transmission source and collimator assembly 31 are adjustable to accommodate variations in the size and position of the nuclear waste package 100. In order to accurately control the positions of the scintillator detector and transmission source and collimator assembly 31, a position sensor may be provided to detect the positions of the scintillator detector and transmission source and collimator assembly 31, in conjunction with a control system, to precisely adjust the positions of the scintillator detector and transmission source and collimator assembly 31.

The transmission source and collimator assembly 31 comprises a projection source and a collimator, the projection source is an existing device, and the collimator is used for simulating certain experimental opening conditions, so that the radioactive source can be detected by penetrating a middle cylindrical object under the condition that the detection end faces are different in size, and the characteristics of the radioactive source can be further researched. The collimator is made of lead, the inner diameter of the collimating hole is 75mm, the outer diameter is 175mm, and the depth is 75 mm; the wall of the collimation hole is made of brass, the thickness of the collimation hole is 2mm, the mechanical strength of the collimation hole is improved, meanwhile, characteristic X rays of a collimator material excited by a radioactive source are shielded, and interference of the rays is reduced. The collimator completely encloses the detector sensitive volume.

The scintillator detector is also provided with a collimator, the collimator is made of lead, the inner diameter of a collimating hole is 5.2mm, the depth is 120mm, and the thickness is 120 mm; the wall of the collimation hole is provided with a brass layer, the thickness of the brass layer is 2mm, the mechanical strength of the collimation hole is increased, and meanwhile, the characteristic X-rays of a collimator material excited by a radioactive source are shielded, and the interference of the rays is reduced.

In addition, the end part of the scintillator detector is also provided with a protective frame 6, and the protective frame is surrounded by 4 lead plates to form a rectangular cavity.

The rotating platform 1, the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 can be respectively a component, and are respectively fixed on the detection platform during use, but the positions of the rotating platform 1, the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 need to be adjusted to meet detection conditions, so that the use is inconvenient. Therefore, as a preferred technical solution, the present invention further includes a base 5, the base 5 may be a plate with a relatively large thickness, and the rotating platform 1, the first lifting platform 2, the second lifting platform 3, and the third lifting platform 4 are all installed on the base 5, specifically, the bottom of the rotating platform 1, the first support frame 23 of the first lifting platform 2, the second support frame 32 of the second lifting platform 3, and the third support frame 44 of the third lifting platform 4 may be fixed on the base 5 by means of bolt connection or welding connection, so as to integrate the devices into a whole, and the use is more convenient.

In testing the nuclear waste package 100, it is necessary to test at a plurality of angles, a plurality of heights, and a plurality of horizontal positions, respectively, specifically:

the detection method of the nuclear waste packaging body dual-mode synchronous scanning detection device comprises the following steps:

A. the nuclear waste packaging body 100 is packaged in an integral mode, the layering number of the sample to be detected is determined, each layer corresponds to one detection height, and if the lowest layer is the first layer, the upper layer is the second layer, and the like are performed in sequence;

B. and adjusting the heights of the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4 to enable the single HPGe detector system 22, the transmission source and collimator assembly 31 and the matrix detector system 41 to face to a first detection height position of the sample to be detected, and then adjusting the horizontal position of the translation platform 21 to enable the single HPGe detector system 22 to be in a first horizontal detection position, wherein the transmission source in the transmission source and collimator assembly 31 is aligned with the center of the single HPGe detector in the single HPGe detector system 22.

C. The single HPGe detector system 22, the transmission source and collimator assembly 31 and the matrix detector system 41 are activated, the single HPGe detector system 22 and the matrix detector system 41 simultaneously begin measuring gamma energy spectra, and transmission measurements and emission measurements are made at a first horizontal detection position at a first detection angle, the emission measurements being of radiation emitted by the nuclear waste package 100 and the transmission measurements being of radiation emitted by the transmission source.

D. The single HPGe detector system 22 is moved to each horizontal detection position and detection is again performed until the transmission and emission measurements at all horizontal detection positions at the first detection angle are completed.

E. The rotary platform 1 rotates by a set angle to enter the next detection angle position.

F. Measuring transmission and emission measurements at all horizontal sensing positions at the next sensing angle position according to the method described in steps C, D and E; the transmission and emission measurements at all detection angle positions are completed until the nuclear waste package 100 rotates one revolution, at which time the scanning of the first layer sample is completed.

G. And C, synchronously lifting the first lifting platform 2, the second lifting platform 3 and the third lifting platform 4, entering the scanning of the second layer of samples, enabling the single HPGe detector system 22, the transmission source and collimator assembly 31 and the matrix detector system 41 to face the next detection height position of the samples to be detected, and completing the scanning of the second layer of samples according to the methods recorded in the steps C to F.

H. Step G is repeated until the gamma spectroscopy measurements at all the detection height positions of the nuclear waste package 100 are completed.

Therefore, the device can detect the nuclear waste packaging body 100 at a plurality of angles, a plurality of heights and a plurality of horizontal positions, and can meet the detection requirement. In addition, the device has a relatively simple structure, the manufacturing cost is lower than that of the conventional array HPGe detector, the function is superior to that of the conventional single HPGe detector, the economy and the universality are considered, meanwhile, the scanning efficiency of the TGS can be obviously improved, the measurement time is shortened, and the chromatography gamma scanning speed is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.